Russia has built reactors for India in the past and is the main supplier of high tech weaponry for India's armed forces. The two signed a deal for 80 military helicopters and for more work on nuclear-powered submarines.
India is a massive country experiencing rapid growth but has few petroleum resources. However, India has major uranium and thorium reserves and is pursuing nuclear power to meet its energy needs.
India: Nuclear Deal With Russia
New York Times - 2 hours ago
By REUTERS President Dmitri A. Medvedev signed agreements Friday to develop new nuclear plants in India. India had earlier signed a nuclear pact with the United States.
Video: Russia and India strike nuclear deal RussiaToday
India-Russia nuclear deal signed BBC News